This page is part of the RCPA Cancer Protocols IG (v0.1.0: Release 1 Draft) based on FHIR R3. This is the current published version. For a full list of available versions, see the Directory of published versions 
For rectal tumours this indicates the options for the relationship to anterior peritoneal reflection.
This code system http://fhir.hl7.org.au/fhir/rcpa/CodeSystem/crc-rel-anterior-peritoneal-reflection defines the following codes: